Constituency diagnosis
Corby and East Northamptonshire
Constituency figures use the 2024 Westminster; comparisons are only valid within one boundary vintage.
In Corby and East Northamptonshire, 13,353 rated homes sit below EPC band C. That puts the area at #511 for the widest gap among constituency areas in England & Wales.
Direction of travel
On current pace, reaches band C by 2048
Projection from the 15-year rated-stock trend; not a forecast.
Retrofit gap
39.9%
of 33,479 rated domestic dwellings are below band C.
EPC Open Data · Open Government Licence · free to cite with attribution.
Homes below band C
13,353
League rank
#511
1 = widest gap.
Cost to reach band C
Is the gap closing?
The latest position for Corby and East Northamptonshire, set against the recent direction of travel.
Fig.1Retrofit gap over time
Stock · year-endShare of Corby and East Northamptonshire's rated dwellings below band C at each year-end, ending at its headline 39.9%. Tracks every home by its latest certificate. EPC register.
What is at stake in the local market
We match HM Land Registry sales to EPC certificates: price per m², below-C matched-sale exposure, the observed C-or-above price/m² spread, and transaction-rate signals. Modelled estimates, shown with match coverage; not valuations. Methodology
Matched-sale exposure
£2.1bn
estimate for below-C stock; not a valuation.
Median sale price
£254k
typical matched sale here.
Matched sale £/m²
£2,836/m²
median, from matched sales.
Spread vs cost
1.08×
observed C+ price/m² spread ÷ modelled cost-to-C.
49.9% coverageMatched-sale estimate from recent HM Land Registry sales. Not a valuation. Methodology.
- £2,836/m²
- £2.1bnmatched-sale estimate of below-C rated stock value; not a valuation
- +3.6%
- 1.26×
Matched sale £/m²
Matched-sale exposure
C+ price/m² spread
Below-C transaction rate
Private rented sector
The rented-stock cut
47.7% (based on 80.1% tenure coverage)
Make it specific
Area averages cannot tell you what one home needs.
Check a real address in Corby and East Northamptonshire for its EPC, running costs, route to band C and available support. Landlords can then compare that home across a portfolio.
Prefer a general estimate? Model a home type in the cost calculator.
For local reporters: this is Corby and East Northamptonshire's citable figure — copy the line below or embed the live widget, free to use with attribution.
Cite this figure / embed
Citation
The Home Index (2026-Q2): Corby and East Northamptonshire has a retrofit gap of 39.9% — the share of rated homes below EPC band C. Source: EPC Open Data (Open Government Licence).
Embed this figure
<iframe src="https://thehomeindex.org/embed/constituency/E14001179" width="320" height="200" style="border:0" title="The Home Index — Corby and East Northamptonshire" loading="lazy"></iframe>